What you're asking is, don't you have any change for coupons? No punishment. According to the personal library, since the shopping mall has indicated on the back of the shopping voucher that the coupon cannot be exchanged for cash or change, there is no penalty for not exchanging the coupon. Coupon can reduce the price of products, and it is a common commercial promotion tool for consumers. Coupons can be printed on the inserts of magazines, attached to newspapers, pasted on the packaging of products, put in shops for people to get, and sometimes even sent to the street for distribution.